absolute_position	Translation of relative coordinates
allocate			memory allocation
compute				Graphicals ->request_compute and ->compute
cursor				Determining visual cursor
dialog				Dialog layout
editor				Various editor happenings
event				Various things with events
fill				Filling text (editor)
flash				Flashing graphicals
float				Floating point conversions
focus				Event focusing
fragment			Fragment handling
frame				Various frame events
gc					Incremental garbage collection
get_xref			Maintenance of X id database
image				Some image functions
clone				Cloning objects
menu				Menu repaint
message				Execution of message objects
obtain				Failing obtainers
path				Smoothing paths
popup				Popup menu's
post				Event posting (event ->post)
postscript			PostScript generation
process				Actions on handling subprocesses
redraw				Repaint management
save				`Object ->save_in_file`
scan				`char_array <-scan`
scroll				Scrollbar handling
shift				text_image shifting of lines
spatial				execution of spatial constraints
text				Updating of text_images
undo				Undo in text_buffers
xref				X window references database

pce->nodebug_subject removes an item from this list.

User code may exploit the same mechanism and test whether debugging a subject is enabled using pce->debugging_subject.

See also

- display->open
- pce->nodebug_subject
- topic Tracing
- pce->debug